Mazaya Real Estate Development Co.

Kuwait

Mazaya Real Estate Development Co.

Kuwait

Time filter

Source Type

Jarkas A.M.,Mazaya Real Estate Development Co.
International Journal of Construction Management | Year: 2010

Several factors affect construction labour productivity, but one of the most important is buildability. Despite the plethora of research into labour productivity, a thorough examination of the literature revealed a dearth of research into the influence of buildability factors on the labour productivity of in situ reinforced concrete construction. Since walls form major parts of many reinforced concrete structures; especially slab-wall structural configurations, the objective of this research is to investigate the influence of the wall surface area and perimeter geometry on formwork labour efficiency. To achieve this objective, a sufficiently large volume of formwork productivity data were collected and analyzed using the multiple regression method. As a result, the effects and relative influence of the shutter surface area and the number of angles formed along the wall perimeter on formwork labour productivity were determined. The results obtained show significant influence of the factors investigated on the efficiency of the formwork operation that can be used to provide designers with feedback on how well their designs consider buildability, and the tangible consequences of their decisions on labour productivity. On the other hand, the findings provide guidance to construction managers for effective activity planning and efficient labour utilization.


Jarkas A.M.,Mazaya Real Estate Development Co.
Journal of Civil Engineering and Management | Year: 2010

The impacts of buildability on formwork labour productivity of major in situ reinforced concrete elements such as, foundations, walls, columns, beams and slabs, are yet to be determined and quantified. The labour unit cost of columns formwork, in comparison with other constituents of the reinforced concrete frame, is constantly higher due to the forming complexity of these elements, especially non-rectangular shapes, and the small output achieved in the operation. Therefore, the objective of this research is to investigate the impacts of build-ability factors on columns formwork labour productivity. To achieve this objective, a large volume of productivity data was collected and analyzed using the categorical-regression method. As a result, the impacts of the grid patterns, variability of column sizes, repetition, total and average shutter size, and geometry of columns are quantified. Apart from the variability of column sizes, the findings show significant effects of these factors on labour productivity, which can be used to provide designers feedback on how well their designs consider the requirements of buildability principles, and the consequences of their decisions on labour efficiency. Moreover, the depicted patterns of results may provide guidance to construction managers for effective activity planning and efficient labour utilization.


Jarkas A.M.,Mazaya Real Estate Development Co.
Architectural Engineering and Design Management | Year: 2010

Buildability is one of the most important factors influencing labour productivity. Nevertheless, a thorough investigation of the literature revealed a dearth of research into the effects of buildability on the labour productivity of an integral trade of in situ reinforced concrete construction, namely formwork. In comparison with beamless slabs, the formwork operation of beam-slab floor configurations is a labour-intensive process, which is associated with substantial additional labour inputs. Therefore, the objective of this research is to explore the buildability factors influencing the formwork labour productivity of building floor slab panels. To achieve this objective, a sufficiently large volume of labour productivity data is collected, at the activity level, and analysed using the categorical interaction-regression method. As a result, the main and interaction effects of repetition, panel areas and geometry of panels on labour productivity are determined. The findings show a significant influence of these factors and corroborate the importance of applying the concepts of design rationalization, standardization and repetition to the design stage of construction projects. The results may be used to provide designers with feedback on how well their designs consider the requirements of buildability principles, and the consequences of their decisions on the efficiency of the operation. © 2010 Earthscan ISSN.


Jarkas A.M.,Mazaya Real Estate Development Co
Journal of Engineering Science and Technology Review | Year: 2010

Labour productivity is affected by several factors, but buildability is among the most important. Nevertheless, a thorough examination of the literature revealed a dearth of research into the influence of buildability factors on labour productivity of in situ reinforced concrete construction, especially at the formwork trade level. Although edge formwork is an important labour intensive activity, most often, its labour cost is either crudely estimated or lumped within the formwork cost of other activities. Therefore, the objective of this research is to investigate and quantify the effects and relative influence of the following buildability factors on its labour productivity: (a) depth of slab being edge-formed; (b) slab geometric factor; and (c) type of formwork material used. To achieve this objective, a sufficiently large volume of productivity data was collected and analyzed using the multiple categorical-regression method. As a result, the effects and relative influence of the buildability factors investigated are determined. The findings show significant effects of these factors on edge formwork labour productivity, which can be used to provide designers feedback on how well their designs consider the requirements of buildability principles, and the consequences of their decisions on labour efficiency. On the other hand, the depicted patterns of results may provide guidance to construction managers for effective activity planning and efficient labour utilization. © 2010 Kavala Institute of Technology.

Loading Mazaya Real Estate Development Co. collaborators
Loading Mazaya Real Estate Development Co. collaborators